зеркало из https://github.com/mozilla/gecko-dev.git
97 строки
2.3 KiB
C++
97 строки
2.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=2 et sw=2 tw=80: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef mozilla_plugins_MiniShmParent_h
|
|
#define mozilla_plugins_MiniShmParent_h
|
|
|
|
#include "MiniShmBase.h"
|
|
|
|
#include <string>
|
|
|
|
namespace mozilla {
|
|
namespace plugins {
|
|
|
|
/**
|
|
* This class provides a lightweight shared memory interface for a parent
|
|
* process in Win32.
|
|
* This code assumes that there is a parent-child relationship between
|
|
* processes, as it creates inheritable handles.
|
|
* Note that this class is *not* an IPDL actor.
|
|
*
|
|
* @see MiniShmChild
|
|
*/
|
|
class MiniShmParent : public MiniShmBase
|
|
{
|
|
public:
|
|
MiniShmParent();
|
|
virtual ~MiniShmParent();
|
|
|
|
static const unsigned int kDefaultMiniShmSectionSize;
|
|
|
|
/**
|
|
* Initialize shared memory on the parent side.
|
|
*
|
|
* @param aObserver A MiniShmObserver object to receive event notifications.
|
|
* @param aTimeout Timeout in milliseconds.
|
|
* @param aSectionSize Desired size of the shared memory section. This is
|
|
* expected to be a multiple of 0x1000 (4KiB).
|
|
* @return nsresult error code
|
|
*/
|
|
nsresult
|
|
Init(MiniShmObserver* aObserver, const DWORD aTimeout,
|
|
const unsigned int aSectionSize = kDefaultMiniShmSectionSize);
|
|
|
|
/**
|
|
* Destroys the shared memory section. Useful to explicitly release
|
|
* resources if it is known that they won't be needed again.
|
|
*/
|
|
void
|
|
CleanUp();
|
|
|
|
/**
|
|
* Provides a cookie string that should be passed to MiniShmChild
|
|
* during its initialization.
|
|
*
|
|
* @param aCookie A std::wstring variable to receive the cookie.
|
|
* @return nsresult error code
|
|
*/
|
|
nsresult
|
|
GetCookie(std::wstring& aCookie);
|
|
|
|
virtual nsresult
|
|
Send() MOZ_OVERRIDE;
|
|
|
|
bool
|
|
IsConnected() const;
|
|
|
|
protected:
|
|
void
|
|
OnEvent() MOZ_OVERRIDE;
|
|
|
|
private:
|
|
void
|
|
FinalizeConnection();
|
|
|
|
unsigned int mSectionSize;
|
|
HANDLE mParentEvent;
|
|
HANDLE mParentGuard;
|
|
HANDLE mChildEvent;
|
|
HANDLE mChildGuard;
|
|
HANDLE mRegWait;
|
|
HANDLE mFileMapping;
|
|
LPVOID mView;
|
|
bool mIsConnected;
|
|
DWORD mTimeout;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(MiniShmParent);
|
|
};
|
|
|
|
} // namespace plugins
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_plugins_MiniShmParent_h
|
|
|